Studies on the Activities of Three Kinds of Soil Enzyme, Organic Matters, Microbes and the Yields and Quality of Apple in Different Tree-aged Apple Orchards in Loess Plateau
TIAN Jia1, SUN Chao1, YANG Ming-yan2, ZHANG Xiao-qi1*
. 2012, (5): 115 -122 .  DOI: 10.3969/j.issn.1008-0864.2012.05.18

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